What is a geofeed?
A text file you host that says where your IP prefixes are. The format is RFC 8805. One file can correct many databases. Do not list a customer’s home as the location of a shared mobile block.
RFC 8805
Geofeed generator
A CSV line vendors can read. Host the file on HTTPS, then point your registry’s geofeed remark at it. How to publish it.
Fields are prefix,country,region,city,postal. Country is ISO 3166-1. Region is ISO 3166-2. Commas inside a field are removed so the columns stay put. The spec is RFC 8805.